Mechanical movement.



A. KREGLING.

MECHANICAL MOVEMENT.

APPLICATION FILED FEB- 5. HM].

' Patenwi m0. 11,191?

2 SHEETS-SHEET I.

x I 3144 14 501 fldaiphrgh'ny.

Patentad D60. 11, 19W,

2 SHEETS-SHEET 2.

A. KREGLING.

MECHANICAL MOVEMENT.

APPLICATION FILED FEB- 5. 1911.

known nanenrne, or name-errant; ecnnnerrenn MEGHY'ANICAL MOVEMENT.

rate-nae;

, App-neetien filed rettuar y s, 191v. sena neutered skilled in the artto which it appertains "to make and use the same.

This invention relates especially to a mechanism for embodiment in ancom pres'sor which is especially adapted not only as an air compressorfor allpurpOSesbUt also for attachment on an automobile for furnishingcompressed {air particularly in inflating tires. p I p The primaryobject resides in animproved piston-operating mechanism for graduanreducing the speed of the piston on its compression. stroke andeffecting a rapid return stroke of the same, whereby the load on themotor is reduced to a minimum.

The invention further'resides in the features of construction, and thearrangements and comblnatlons of parts here nafter de-.

I Fig. 1 taken at right angles to that of the latter;

Figs. 3, 1, 5 and 6 are diagrammatic views illustrating four positionswhich the pistonoperating means assumes during its cycle of operation.

Referring now in detail to the drawings, the numeral 1 designates thecrank case or engine base and 2 the cylinder or pump chamber which hasan intake 3, that is con trolled by a spring actuated valve 4, and anoutlet 5, that is closed by a ball valve 6, said intake and outlet beingprovided in the cylinder head 7 I The piston 8 is reciprocable in thecylinder 2 and is pivotally connected by a piston rod 9 to a crank pin10 that extends from opposite sides of the rod.

In one Side of the crank case is a bearing 11 in which is journaled ashaft 12 that has a fixedly mounted crank arm 13 to the outer end ofwhich the crank pin is swiveled. The opposite side of the crank case isremovable Specification of Letters; Patent.

Patented @miihldl't;

and is also provided with a shaft bearing 1'4" 1 in which is-j-eurnaledthe; drive shaft the outer, projectin end efyeaid shaft being grooved at16, or otherwise formed, tobfej coupled te source of power- I (notshown)- Fixed on the inner end of shaft 15 is a crank arni' l7 thatcarries a swivele'cl "crank pin 18,

mount the shaft 15 eecentrieally relative te the shaft 12. Thus, thecrank arms lgaii'd 1 7 rotate'in circles that are axially offset.

A connecting link 1'9 j cine the crank pins 10 and I8, having'swivelconnection with eaense that as theshaft 15 is rotated, rotaiy movementwill be imparted to shaft 12 and the piston recipre ated. This linkeen'neet's theouterend ofthe drive crank arm 17 to the outer end of theeceentrieally rel ted crank arml'ii for driving the latter. and atfording jthe desired motion to the piston. Suitable oil ducts 90 areprovided for convenient'ly supplying a lubricant to the bear? ings andcrank case as is apparent.

B referring tc Figs. 3 to 6, inclusive, i

with the, crank. arms divergently related as depicted in Fig. 3, andpower being app-lied to the drive crank member, the arm will rotate inthe direction of the arrow and pull the arm .13 with it, through theinstrumentality of connecting link 19. In Fig. 4c, the drive crank hasrevolved substantially a quarter turn during which the initialcompressive movement of the piston has been comparatively fast. Duringthe next quarter turn of shaft 15, as viewed in Fig. 5, the movement ofthe piston Will gradually decrease as the center lines of the crank arms13 and 17 and link 19 approach a common line or coinciding relation. Theconnecting link 19 being shorter than crank arm 17, the former willcontinue to pull on the crank pin 10 during the next succeeding quarterturn but at a very much reduced speed. The exceedingly slow movement ofthe piston is caused by the arm 17 and link 19 swinging intocoincidence, after which the continued rotation of crank arm 17 willswing the link about its pivotal mounting 10, the latter passing fromone side of the center line of arm 17 to the opposite side, as shown inFigs. 5 and 6. The are which the crank pin traverses is exceedinglysmall and, consequently, the extent of movement of the piston is verysmall. During this third quarter turn of the drive shaft 15, the link 19swings in a much freer manner about the pin 10 through the breaking ofthe toggle relation between said link and the crank arm 13. The fourthquarter turn of shaft 15 brings the related parts from the positiondepicted in Fig. etc that shown in Fig. 3. During thislast quarter turn,the link 19 and arm 13 register at' which moment the pin 10. ispractically free to pivot 18 is swung almost directly toward the pivot12of arm 13. Consequently, this quarter revolution of shaft 15'elfectssubstantially a half revolution of shaft 12 and a quick andcomplete return stroke of the piston.

'Therefore, the working I or compression stroke requires practicallythree-quarters of a revolution of shaft 15 and the return stroke theremaining quarter revolution, The third quarter, or the last quarterrevolution of the com'pression stroke moves the piston a comparativelysmall distance, a very practical operation since the last part of acompression stroke i is offered theflg'reatest resistance and requiresthe greatest force, This operation afiords a comparatively largemovementof thedrive ,for thefinal compressive action of the piston andthereby relieves the drive from undue strain.

Further, the compression stroke from the it is primarily intended foruse on an automobile to which it may be connected, as through the camshaft or other suitable rotary, part (not shown). A higher pressure isobviously obtainable by this particular movement, and the constructionis rendered more durable and eflicient.

What is claimed is:

In a mechanical movement, in combination, a fixedly mounted drive shaft,a fixedly mounted driven shaft cccentrically disposed relative thereto,a crank arm fixed on each shaft, a crank pin carried on the outer end ofeach crank arm and extending toward each other, I the driven crank pinbeing longer than the driving crank pin, a rigid connecting link betweenthe latter and the driven crank pin, and a reciprocatory rod pivotallyconnected to the driven crank pin and arranged between the driven crankand the connecting link.

In testimony whereof I aflix my signature in presence of two witnesses.

ADOLPI-I KREGLING.

Witnesses:

F. W. SMITH, Jr., M. T. LoivcnnN.

Copies of this yummy be obtained for five cents each, by addressing the"Commissioner of Patents,

7 Washington, D. 0.

